Numerical Methods Elements of Electromagnetics Fourth Edition Sadiku
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Numerical Methods Elements of Electromagnetics Fourth Edition Sadiku 1
Figure 14. 1 A small displacement on a field line. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 2
Figure 14. 2 Generated points on E-field lines (shown thick) and equipotential lines (dotted). Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 3
Figure 14. 3 Computer program for Example 14. 1. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 4
Figure 14. 3 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 5
Figure 14. 3 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 6
Figure 14. 3 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 7
Figure 14. 4 For Example 14. 1; plots of E-field lines and equipotential lines due to (a) two point charges and (b) four point charges (a two-dimensional quadrupole). Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 8
Figure 14. 5 For Practice Exercise 14. 1. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 9
Figure 14. 6 Finite difference solution pattern: (a) division of the solution into grid points, (b) finite difference five-node molecule. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 10
Figure 14. 7 Finite difference solution pattern for the wave equation: eq. (14. 19). Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 11
Figure 14. 8 For Example 14. 2. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 12
Figure 14. 9 Computer program for Example 14. 2. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 13
Figure 14. 10 For Example 14. 2: plot of F(x). Continuous curve is for N = 10; dashed curve is for N = 4. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 14
Figure 14. 11 For Example 14. 3. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 15
Figure 14. 12 For Example 14. 3; the values not crossed out are the solutions after five iterations. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 16
Figure 14. 13 For Practice Exercise 14. 3. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 17
Figure 14. 14 For Example 14. 4. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 18
Figure 14. 15 For Example 14. 4; a 15 ´ 10 grid. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 19
Figure 14. 16 Computer program for Example 14. 4. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 20
Figure 14. 16 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 21
Figure 14. 17 For Practice Exercise 14. 4. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 22
Figure 14. 18 Thin conducting wire held at a constant potential. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 23
Figure 14. 19 Division of the wire into N segments. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 24
Figure 14. 20 Matlab code for calculating the charge distribution on the wire in Figure 14. 18. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 25
Figure 14. 21 Plot of r. L against y. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 26
Figure 14. 22 Parallel-plate capacitor; for Example 14. 5. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 27
Figure 14. 23 Subsections i and j; for Example 14. 5. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 28
Figure 14. 24 Matlab program for Example 14. 5. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 29
Figure 14. 24 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 30
Figure 14. 25 Parallel conducting wires for Practice Exercise 14. 5. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 31
Figure 14. 26 A typical finite element subdivision of an irregular domain. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 32
Figure 14. 27 Typical triangular element; the local node numbering 1 -2 -3 must be counterclockwise as indicated by the arrow. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 33
Figure 14. 28 Shape functions a 1 and a 2 for a triangular element. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 34
Figure 14. 29 Assembly of three elements: i-j-k corresponds to local numbering 1 -2 -3 of the element in Figure 14. 27. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 35
Figure 14. 30 For Example 14. 6: (a) two-element mesh, (b) local and global numbering of the elements. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 36
Figure 14. 31 For Practice Exercise 14. 6. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 37
Figure 14. 32 For Example 14. 7: (a) two-dimensional electrostatic problem, (b) solution region divided into 25 triangular elements. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 38
Figure 14. 33 Computer program for Example 14. 7. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 39
Figure 14. 33 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 40
Figure 14. 34 For Practice Exercise 14. 7. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 41
Figure 14. 35 (a) Shielded double trip line with partial dielectric support. (b) Problem in (a) simplified by taking advantage of symmetry. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 42
Figure 14. 36 Computation molecule for Laplace’s equation. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 43
Figure 14. 37 Interface between media of dielectric permittivities e 1 and e 2. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 44
Figure 14. 38 Computation molecules used for satisfying symmetry conditions: (a) ¶V/dx = 0, (b) ¶V/dy = 0. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 45
Figure 14. 39 The rectangular path ℓ used in calculating a charge enclosed. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 46
Figure 14. 40 Matlab code for Example 14. 8. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 47
Figure 14. 40 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 48
Figure 14. 40 (Continued) Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 49
Figure 14. 41 For Review Questions 14. 3 and 14. 10. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 50
Figure 14. 42 Finite difference grid in cylindrical coordinates; for Problem 14. 5. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 51
Figure 14. 43 For Problem 14. 7. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 52
Figure 14. 44 For Problem 14. 9. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 53
Figure 14. 45 For Problem 14. 10. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 54
Figure 14. 46 For Problem 14. 11. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 55
Figure 14. 47 For Problem 14. 12. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 56
Figure 14. 48 For Problem 14. 13. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 57
Figure 14. 49 For Problem 14. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 58
Figure 14. 50 For Problem 14. 17. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 59
Figure 14. 51 For Problem 14. 18. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 60
Figure 14. 52 For Problem 14. 20. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 61
Figure 14. 53 Analysis of strip transmission line using moment method; for Problem 14. 21. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 62
Figure 14. 54 For Problem 14. 22. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 63
Figure 14. 55 For Problem 14. 23; coaxial line of (a) arbitrary cross section, (b) elliptical cylindrical cross section. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 64
Figure 14. 56 For Problem 14. 24. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 65
Figure 14. 57 For Problem 14. 25. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 66
Figure 14. 58 Triangular elements of Problem 14. 26. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 67
Figure 14. 59 For Problem 14. 27. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 68
Figure 14. 60 For Problem 14. 28. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 69
Figure 14. 61 For Problem 14. 29. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 70
Figure 14. 62 For Problem 14. 30. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 71
Figure 14. 63 For Problems 14. 31 and 14. 32. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 72
Figure 14. 64 For Problem 14. 33. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 73
Figure 14. 65 For Problem 14. 34. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 74
Figure 14. 66 For Problem 14. 37. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 75
Figure 14. 67 For Problem 14. 38. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 76
Figure 14. 68 For Problem 14. 39. Elements of Electromagnetics Fourth Edition Sadiku Copyright © 2007 Oxford University Press 77
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